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ASUS P4SDX motherboard user guide
2-17
DUAL CHANNEL MODE [Auto]
This field when set to [Auto] automatically checks if installed memory supports
128-bit memory bandwidth, otherwise defaults to [64-bit x 2] setting.
Configuration Options: [64-bit x 2] [Auto]
Graphics Aperture Size [64MB]
This feature allows you to select the size of mapped memory for AGP graphic data.
Configuration options: [4MB] [8MB] [16MB] [32MB] [64MB] [128MB] [256MB]
AGP Capability [8X Mode]
This motherboard supports the AGP 8X interface that transfers video data at
2.12GB/s. The configuration options vary depending on the speed of AGP card
installed. If an AGP 4X card is installed, configuration options will be [4X Mode]
and [8X Mode]. The setting [8X Mode] will be the default if an AGP 8X card is
installed. AGP 8X is backward-compatible so you may keep the [4X Mode] setting,
however the AGP interface will only provide a peak data throughput of 1066MB/s
even if you are using an AGP 8X card.
AGP Fast Write Capability [Enabled]
This field enables or disables the AGP 4x Fast Write Capability feature.
Configuration options: [Disabled] [Enabled]
Video Memory Cache Mode [UC]
USWC (uncacheable, speculative write combining) is a new cache technology for
the video memory of the processor. It can greatly improve the display speed by
caching the display data. You must set this to UC (uncacheable) if your display
card does not support this feature, otherwise the system may not boot.
Configuration options: [UC] [USWC]
Delay Transaction [Enabled]
This field enables or disables the PCI delay transaction function.
Configuration options: [Disabled] [Enabled]
Onboard PCI IDE Enable [Both]
This field allows you to enable either the primary IDE channel or secondary IDE
channel, or both. You can also set both channels to [Disabled]. Configuration
options: [Both] [Primary] [Secondary] [Disabled]
IDE Bus Master Support [Enabled]
This item controls the IDE Bus Master support for non-Windows operating
systems. Configuration options: [Disabled] [Enabled]
IDE Driving Strength Tuning [Both]
This item allows you to disable or select the IDE channel for IDE driving strength
tuning. Configuration options: [Both] [Primary] [Secondary] [Disabled]
Refer to section “1.9.3 Memory configurations” for more information.